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Optical and tribomechanical stability of optically variable interference security devices prepared by dual ion beam sputtering

机译:通过双离子束溅射制备的光变干涉安全装置的光学和摩擦力学稳定性

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摘要

Optical security devices applied to banknotes and other documents are exposed to different types of harsh environments involving the cycling of temperature, humidity, chemical agents, and tribomechanical intrusion. In the present work, we study the stability of optically variable devices, namely metameric interference filters, prepared by dual ion beam sputtering onto polycarbonate and glass substrates. Specifically, we assess the color difference as well as the changes in the mechanical properties and integrity of all-dielectric and metal-dielectric systems due to exposure to bleach, detergent and acetone agents, and heat and humidity. The results underline a significant role of the substrate material, of the interfaces, and of the nature and microstructure of the deposited films in long term stability under everyday application conditions.
机译:应用于钞票和其他文件的光学安全设备会暴露于不同类型的恶劣环境中,包括温度,湿度,化学试剂和摩擦机械的循环。在目前的工作中,我们研究了光学可变设备的稳定性,即通过双离子束溅射在聚碳酸酯和玻璃基板上制备的同分异构干涉滤光片。具体而言,我们评估了由于暴露于漂白剂,洗涤剂和丙酮试剂以及热和湿度导致的色差以及全电介质和金属电介质系统的机械性能和完整性的变化。结果强调了在日常应用条件下,基材材料,界面以及沉积膜的性质和微结构在长期稳定性方面的重要作用。

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